The candi, of India, is equal to the Venetian ell. In Siam, the keu ie 36 inchee nearly, and ia divided into 2 aoks; these into 2 keube; and each keub into 12 nione, at X of an inch.
3 inchee ie a palm; 3 palma, or 9 inchea, a span. 5 feet is a pace. 2 yards le a fathom.
The German mile ie the 15th of a degree of latitude, or more than 4X milee English.
A league ia 3 sea miles. 17 Spanish leagues ie a degree, or abont 4 miles, which is the Dutch and German league. The Pereian league, or parasang, ia 30 stadia or furlonge. The Paris line .0888.
The Parie ell is 43.9 inchea.
The French toise 6 feet 4.7'33 inches.
The French league 1-25 of a degree.
The French metre 39.37079 inches. The metre is 4,13.2959 linee, and .513074 of a French toise. Eight chili ometrea is about 5 milea English. 1,000 feet ia nearly 305 metres.
The metre is the ten millionth part of the quadrant of the earth from the equator to the north pole. It differs slightly from the length of a pendulum which, in the lati tude of London, vibratea seconds in a vacuum, at the level of the sea, where it ia 39.1393 inchee; therefore, the metre le only .23 of an inch longer than our pendulum.
The millimetre, or thousandth part, .03937 inches Eng lish.
The centimetre .39371.
Tbe decimetre 3.93708.
The decametre ie 10 timea the metre.
The hecatometre 100 times.
The chiliometre 1,000 timea; and the myriametre 10,000 times.
The area ie 3.95 English perches.
An inch English ie 2.54 centimetree; a yard ie 0.91438 metres; and a mile hi 1609.3149 metres.
The French metre ia the ten millionth of a quadrant of the earth, taken as 6217.857 English miles, or 32,809,167 feet, and a mean degree of' latitude at 69.4129. A cen tesimal degree ia 54 minutes. A league at 25 to a degree ia 2.7617 miles. A Roat league 2,000 tains. or 2.3 miles Englieh; a toiae being 6 feet 6X inches English. The pied one-eixth of the toiee ; and the aune 3 feet 11X inches Englieh.
A degree at the equator is 365,101 feet, or 69.148 miles, or 69 1-7 nearly. In latitude 66.20 Mauperlius measured a degree of latitude, in 1737, and made it 69.403; and Swan berg, in 1803, made it 69.292. At the equator. in 1744, four aetronomera made it 68.732; and Lambtou. in lati tude 12, 68.743. Mudge, in England, makea it 69.148. Cassini, in France, in 1718 and 1740, made it 69.12, and Biot 68.769: while a recent meaeure in Spain makes it but 68.63, lees than at the equator; and contradicts all the othera proving the earth to be a prolate spheroid, which was the opinion of Caasini, Bernouilli, Euler, and ot hera, while it has more generally been regarded aa an oblate spheroid.
Degrees of longitude are to each other iu length, as the coeinee of their latitudea. Longitudinal linee run from north to aouth; latitude from eaat to west. For every 10° they are ae follows: Equator 69.2 10° 68.15 20 65.27 30 59.93 40 63.1 50 44.48 55.. 39 69 60 24.6 70 23.67 80 12.02 The diameter of the equatorial circle is 41,837,491.S feet, and its circumference 131,436,444 feet, which, in a sidereal day, givea a velocity of 1,525 feet per eecond of rotation.
Then 1,525 x 4-6100 for the velocity of the aurface of the whole ephere, which+16.08728. the mean force per aecond, givee 93.132 feet per aecond for the orbit velocity of the earth; and this multiplied by 31 558,151 seconds in a sidereal year, givea a meau orbit of 586,527,362.6 miles; and a mean radiva, or distance from the earth to the aun, of 93,348,800 milee. The aphelion diatance ia 91,918.509 milee, and the perihelion 91 779,000.
The pendulum which vibratea aeconds 39.1393 inches at London, is the atandard for the British meaaurea. One mile la equal to 1618.833 auch penduluma.